A game involving a group of people (usually over three). Everyone must get in a circle and on the count of three, must take a random pose. After that, going clockwise, one person at a time must try to slap another person's hand (any person). If the person hits another person's hand, the person who was hit must leave the circle. Whether successfully hitting or missing, one must stay in that pose. Only the person who's turn it is and the person who he/she has aimed for may move at a time. The person who is aimed for doesn't go next; the next person is always to the left of the person who just went. The game ends once only one person is left. This game is usually played to pass the time.
Today, in line for the concert, we played ninja slap while the others in line watched in disbelief with a confused look on their faces.